celicaboy,
any and everything u need to know about the 7 can be found on http://www.supraforums.com/
as well as a whole lot of other supra sites. Mk3 owners are not "rich guys" so they can find deals.
Since you have a Wolf? I'd think 660 or 720s would do, so you won't need to upgrade again, depending on your final goal. Used 550s and kicked up fuel pressure should take you ~550hp. I would think 440s will cover your ct26 hybrid but, with an upgrade fuel pump and regulator.